How long can social security be supplemented at most?

Social security can be paid for two years at most, that is, 24 months, that is to say, from the month of payment, it is calculated according to the time period of payment, not according to the cumulative month. Under normal circumstances, the general unit can only make up for 2 months. If it takes longer, it has to be operated through some agencies. Article 23 of the Social Insurance Law, employees shall participate in the basic medical insurance for employees, and the employer and employees shall jointly pay the basic medical insurance premium in accordance with state regulations. Individual industrial and commercial households without employees, part-time employees who have not participated in the basic medical insurance for employees and other flexible employees can participate in the basic medical insurance for employees, and individuals pay the basic medical insurance premium in accordance with state regulations.

Legal objectivity:

Article 63 of the Social Insurance Law stipulates that if the employer fails to pay social insurance premiums in full and on time, the social insurance premium collection agency shall order it to pay or make up within a time limit.